A while ago I was testing my site on different browsers if my favicon.ico will show up and I also have tested it on my phone but it seems like it only shows up in chrome browser while the other browsers such as mozilla and IE it doesn’t display the favicon that I have set. I converted my *.ico to *.png and tried to set it and it successfully shows up on all my browsers as well as on my phone. It seems like the other browsers would not recognize if your favicon is *.ico file. Hope this could help those who are looking for answers. Have a great day!